Weather in April — Sebastian, Florida

Normal April weather in Sebastian, read from the Vero Beach record, is an 81.9°F afternoon, a 62.4°F night and 3.06 inches of rain over the month.

Those figures are NOAA's 1991 to 2020 normals for the Vero Beach airport station, the long record that NWS Melbourne reports for Indian River County (NOAA NCEI monthly normals). The April mean of 72.1°F is 4.1 degrees above March, and April averages 1.6 days at 90°F or hotter. Nights under 40°F disappear from the April normals in Sebastian, and nights under 50°F drop to 2.2.

April's day to night spread narrows to 19.5 degrees at Vero Beach, down from 20.8 in March, for Sebastian and the Indian River Lagoon shoreline. The record April range at the station runs from 36°F on April 5, 1987 to 97°F on April 13, 2020, according to the NWS Melbourne April report (NWS Melbourne April 2026 climate report, IEM archive).

April rain in Sebastian swings from almost nothing to more than double the normal, and the last two Aprils at Vero Beach show both ends: 0.16 inches in 2025 and 8.13 inches in 2026.

April 2025 measured 0.16 inches at Vero Beach, 2.90 inches below normal, with rain on 3 days and only 1 day reaching a tenth of an inch (NWS Melbourne April 2025 climate report, IEM archive). The station's driest April remains 0.02 inches in 1946, and its wettest is 10.45 inches in 1997.

April 2026 went the other way in Sebastian. The station measured 8.13 inches, 5.07 above normal, with 3 days of an inch or more and 4.69 inches between April 8 and April 9 (April 2026 report). Wind came from the northeast and east during that storm: a 43 mph gust from 040 degrees on April 7 and 30 mph sustained from 070 degrees on April 8.

The NOAA normals frame how unusual those totals were for the Vero Beach station south of Sebastian. A quarter of Aprils in the 1991 to 2020 record end with less than 1.52 inches, and a quarter end with more than 4.06 inches, so 2025 sat far below the low quartile and 2026 roughly doubled the high one.

Both recent Aprils in Sebastian topped out at 91°F at the Vero Beach station, but April 2026 ran with warmer nights, cloudier skies and stronger wind than April 2025.

In April 2026 the warmest afternoons reached 91°F on April 26 and April 30, and the coolest morning was 59°F on April 17. Average lows ran 3.9 degrees above normal at 66.3°F, while average highs ran 0.8 degrees below normal at 81.1°F, a pattern that fits a cloudy, wet month on the Treasure Coast. The report classed 20 days as partly cloudy and only 6 as fair.

April 2026 was also the windiest of the two Aprils over the Indian River Lagoon and the riverfront along Indian River Drive, with an average wind speed of 10.2 mph at Vero Beach and heavy rain on 5 days. April 2025 averaged 9.6 mph, reached 91°F on April 7 and fell to 52°F on April 14, its average low still 2.6 degrees above normal at 65.0°F.

April beach water north of Sebastian Inlet averages 78.9°F at Trident Pier, 4.6 degrees warmer than the offshore Canaveral buoy, the widest lead the pier holds over the buoy in any month.

NOAA's monthly averages put the Canaveral buoy 20 nautical miles offshore at 74.3°F in April and Lake Worth Pier, south of Sebastian, at 77.8°F (NOAA Coastal Water Temperature Guide). Trident Pier's April average of 78.9°F is 4.5 degrees above its March figure.

For the beaches at Sebastian Inlet State Park and Wabasso Beach, which lie between those stations, April is the month when shallow coastal water runs warmest relative to the open Atlantic. By May the gap at Trident Pier shrinks to 2.8 degrees, as the offshore water catches up.

April is a fire weather month in east central Florida, including Sebastian and Indian River County: NWS Melbourne's lightning climatology calls April the driest month of the year for Florida as a whole.

At the Vero Beach station itself, February is drier, at 2.20 inches against April's 3.06, but April adds heat: its normal high is 6.3 degrees above February's. NWS Melbourne's climatology also notes that lightning increases in April even as the state dries, with sea breeze forcing beginning along the coast of the peninsula (NWS Melbourne lightning climatology).

NWS Melbourne's fire weather page gathers the tools used for that season near Sebastian, including the Red Flag Watch and Warning product, Florida Forest Service fire danger ratings and the Keetch-Byram Drought Index (NWS Melbourne fire weather). Its storm survey list includes the April 27, 2006 Port St. John wildfire in Brevard County (NWS Melbourne storm surveys).

April storms near Sebastian are mostly squall lines and hail or wind storms ahead of late season fronts, joined by the first sea breeze thunderstorms of the year.

NWS Melbourne's storm survey list for April includes hail and wind storms across central Florida on April 8, 2004, a microburst in Melbourne on April 27, 2004, a squall line on April 14, 2009, EF0 tornadoes at Viera, Rockledge and Cocoa on April 14, 2013, and the Fort Drum EF2 tornado on April 6, 2017. All of those places lie within the same forecast area as Sebastian.

Lightning doubles in April. NWS Melbourne estimates about 576 cloud to ground strikes in neighboring Brevard County in a typical April, against about 288 in March (NWS Melbourne lightning statistics). April 2026 at Vero Beach recorded thunder on 4 days and April 2025 on 1 day.

The current NWS Melbourne dry season outlook, issued September 30, 2026, runs through April 30, 2027 and headlines increased potential for well above normal rainfall and severe weather, so April 2027 in Sebastian is inside its forecast window (NWS Melbourne dry season outlook). Readings for Sebastian itself post from Sebastian Municipal Airport (KX26) on the NWS forecast page (NWS forecast for Sebastian).